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A064480 Form a conjugate partition of row with 1+1+1 in first row. all other rows are the union of their parents. n-th row sum is equal to 3*2^(n-1). The largest part of n-th row is A000204(n). a(n) = number of types of piles in n-th row. 0
1, 2, 3, 5, 7, 10, 13, 19, 26, 36, 51, 69, 94, 130, 188 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

(first row: 1+1+1 and the other conjugate partition is 3; 2nd row is union of 1+1+1 and 3.) (2nd row: 3+1+1+1 and the other conjugate partition is 4+1+1; 3rd row is union of 3+1+1+1 and 4+1+1.) (3rd row: 4+3+1+1+1+1+1 and the other conjugate partition is 7+2+2+1; 4th row is union of 4+3+1+1+1+1+1 and 7+2+2+1.)

CROSSREFS

Cf. A000700, A000701, A000204.

Sequence in context: A005691 A035954 A023192 * A274111 A209000 A115024

Adjacent sequences:  A064477 A064478 A064479 * A064481 A064482 A064483

KEYWORD

easy,nonn

AUTHOR

Naohiro Nomoto, Feb 14 2002

STATUS

approved

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Last modified July 19 22:14 EDT 2019. Contains 325168 sequences. (Running on oeis4.)