A182250 - OEIS

A182250

a(0)=2, a(n) = (a(n-1) * n) OR n.

2, 3, 6, 19, 76, 381, 2286, 16007, 128056, 1152505, 11525050, 126775551, 1521306620, 19776986061, 276877804862, 4153167072943, 66450673167088, 1129661443840497, 20333905989128946, 386344213793449975, 7726884275868999516

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OFFSET

0,1

LINKS

Table of n, a(n) for n=0..20.

FORMULA

a(0)=2, a(n)=(a(n-1)*n) OR n, where OR is the bitwise logical inclusive-OR operator.

PROG

(Python)

a=2

for i in range(1, 51):

print(a, end=', ')

a *= i

a |= i

CROSSREFS

Sequence in context: A233239 A018290 A364645 * A121959 A075633 A141048

Adjacent sequences: A182247 A182248 A182249 * A182251 A182252 A182253

KEYWORD

base,nonn

AUTHOR

Alex Ratushnyak, Apr 20 2012

STATUS

approved