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 A051486 Triangle T(n,k) = number of symmetric Boolean functions of n variables and rank from 0 to 2^n. 1
 1, 1, 1, 2, 1, 1, 2, 2, 2, 1, 1, 2, 1, 2, 4, 2, 1, 2, 1, 1, 2, 1, 0, 2, 4, 3, 2, 2, 2, 3, 4, 2, 0, 1, 2, 1, 1, 2, 1, 0, 0, 2, 4, 2, 0, 0, 3, 6, 3, 0, 0, 4, 8, 4, 0, 0, 3, 6, 3, 0, 0, 2, 4, 2, 0, 0, 1, 2, 1, 1, 2, 1, 0, 0, 0, 2, 4, 2, 0, 0, 0, 1, 2, 1, 2, 4, 2, 0, 0, 1, 6, 9, 4, 0, 0, 2, 6, 6, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 LINKS EXAMPLE [1, 1], [1, 2, 1], [1, 2, 2, 2, 1], [1, 2, 1, 2, 4, 2, 1, 2, 1], ... CROSSREFS Row sums give A011782. Sequence in context: A109073 A255337 A026465 * A218541 A213911 A081355 Adjacent sequences:  A051483 A051484 A051485 * A051487 A051488 A051489 KEYWORD nonn,tabf,nice AUTHOR STATUS approved

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Last modified January 22 13:41 EST 2020. Contains 331149 sequences. (Running on oeis4.)