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 A213541 a(n) = n AND n^2, where AND is the bitwise AND operator. 7
 0, 1, 0, 1, 0, 1, 4, 1, 0, 1, 0, 9, 0, 9, 4, 1, 0, 1, 0, 1, 16, 17, 4, 17, 0, 17, 0, 25, 16, 9, 4, 1, 0, 1, 0, 1, 0, 1, 36, 33, 0, 1, 32, 41, 0, 41, 4, 33, 0, 33, 0, 33, 16, 49, 36, 17, 0, 49, 32, 25, 16, 9, 4, 1, 0, 1, 0, 1, 0, 1, 4, 1, 64, 65, 64, 73, 0, 9, 68 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,7 COMMENTS The graph of this sequence has the shape of a tilted Sierpinski triangle. - WG Zeist, Jan 15 2019 LINKS Reinhard Zumkeller, Table of n, a(n) for n = 0..8192 MATHEMATICA Table[BitAnd[n, n^2], {n, 0, 63}] (* Alonso del Arte, Jun 19 2012 *) PROG (Python) for n in range(99):     print n*n & n, (Haskell) import Data.Bits ((.&.)) a213541 n = n .&. n ^ 2  -- Reinhard Zumkeller, Apr 25 2013 (PARI) a(n) = bitand(n, n^2); \\ Michel Marcus, Jan 15 2019 CROSSREFS Cf. A213370. Cf. A000290. Cf. A007745 (OR), A169810 (XOR), A002378. Sequence in context: A291574 A094924 A056968 * A181435 A206774 A307850 Adjacent sequences:  A213538 A213539 A213540 * A213542 A213543 A213544 KEYWORD nonn,base,easy,less,look AUTHOR Alex Ratushnyak, Jun 14 2012 STATUS approved

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Last modified April 3 01:39 EDT 2020. Contains 333195 sequences. (Running on oeis4.)