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A182538 a(n) = (a(n-1) AND a(n-2)) + n. 2
0, 1, 2, 3, 6, 7, 12, 11, 16, 9, 10, 19, 14, 15, 28, 27, 40, 25, 26, 43, 30, 31, 52, 43, 56, 65, 26, 27, 54, 47, 68, 35, 32, 65, 34, 35, 70, 39, 44, 75, 48, 41, 74, 51, 46, 79, 60, 59, 104, 89, 122, 139, 62, 63, 116, 107, 152, 65, 58, 59, 118, 111, 164, 99, 96, 161, 98, 99, 166, 103 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Iain Fox, Table of n, a(n) for n = 0..10000

FORMULA

a(0)=0, a(1)=1, a(n)=(a(n-1) AND a(n-2)) + n, where AND is the bitwise AND operator.

PROG

(Python)

prpr, prev = 0, 1

for n in range(2, 99):

.  current = (prpr & prev) + n

.  print prpr,

.  prpr, prev = prev, current

(PARI) first(n)=my(res=vector(n, i, i-1)); for(x=3, n, res[x]=bitand(res[x-1], res[x-2])+x-1); res \\ Iain Fox, Nov 05 2018

CROSSREFS

Cf. A182536.

Sequence in context: A023773 A115889 A101319 * A030013 A130404 A064689

Adjacent sequences:  A182535 A182536 A182537 * A182539 A182540 A182541

KEYWORD

nonn,base,look,easy

AUTHOR

Alex Ratushnyak, May 04 2012

STATUS

approved

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Last modified January 18 16:40 EST 2019. Contains 319271 sequences. (Running on oeis4.)