A089355 - OEIS

This site is supported by donations to The OEIS Foundation.

A089355

A quarter-square shaped (A002620) staircase array distributing the frequency of objects counted by A047970.

1, 1, 1, 1, 2, 1, 1, 1, 3, 2, 4, 2, 2, 1, 4, 3, 8, 7, 9, 5, 5, 1, 1, 5, 4, 13, 14, 23, 20, 25, 16, 14, 7, 2, 1, 1, 6, 5, 19, 23, 44, 49, 71, 65, 75, 60, 48, 32, 18, 6, 1, 1, 7, 6, 26, 34, 73, 94, 154, 172, 232, 234, 249, 228, 195, 145, 101, 59, 27, 9, 2 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,5`
	EXAMPLE	`The array begins:` `1..1..1..1..1..1..1....` `...1..2..3..4..5..6....` `......1..2..3..4..5....` `......1..4..8.13.19....` `where the fourth row counts the ordered partitions of type 221^k and type 41^k since (1 3 6 10 15 ...) + (0 1 2 3 4 ...) yields the required result.`
	CROSSREFS	`Sequence in context: A120221 A094899 A057774 * A136043 A096815 A193516` `Adjacent sequences: A089352 A089353 A089354 * A089356 A089357 A089358`
	KEYWORD	`nonn,tabf`
	AUTHOR	`Alford Arnold (Alford1940(AT)aol.com), Dec 26 2003`

Content is available under The OEIS End-User License Agreement .

Last modified February 14 07:16 EST 2012. Contains 205589 sequences.