id:A080571 - OEIS Search Results

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Number of 2's in partition of n-th Ulam number into sum of two distinct Ulam numbers.

+0
2

0, 1, 1, 1, 2, 3, 4, 5, 6, 7, 10, 11, 14, 15, 18, 18, 20, 21, 24, 26, 27, 29, 31, 33, 37, 38, 39, 40, 43, 47, 50, 53, 55, 56, 59, 66, 67, 68, 69, 72, 75, 78, 79, 83, 84, 90, 91, 92, 93, 96, 98, 99, 104, 107, 118, 120, 121, 123, 128, 129, 136, 137, 138, 141, 146, 149, 153, 154 (list; graph; listen)

	OFFSET	`1,5`
	EXAMPLE	`For n=7: A002858(7) = 11 = 3+8 = (1+2)+(2+6) = (1+2)+(2+(2+4)) = (1+2)+(2+(2+(1+3))) = (1+2)+(2+(2+(1+(1+2)))). Number of 2's in (1+2)+(2+(2+(1+(1+2)))) is 4, so a(7) = 4.`
	CROSSREFS	`Cf. A002858.` `Sequence in context: A001751 A116000 A050725 this_sequence A165805 A165722 A082400` `Adjacent sequences: A080568 A080569 A080570 this_sequence A080572 A080573 A080574`
	KEYWORD	`easy,nonn`
	AUTHOR	`Naohiro Nomoto (n_nomoto(AT)yabumi.com), Feb 22 2003`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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