A090978 - OEIS

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A090978

a(n) = n + Sum{a(k): 1<=k<n and a(k) divides n}.

1, 3, 7, 5, 11, 10, 15, 9, 22, 26, 23, 16, 14, 36, 39, 33, 18, 49, 20, 56, 32, 56, 47, 28, 31, 53, 40, 78, 30, 94, 63, 81, 81, 35, 83, 103, 38, 77, 82, 116, 42, 109, 44, 122, 78, 70, 95, 68, 106, 66, 55, 79, 107, 85, 127, 218, 61, 59, 119, 144, 123, 94, 146, 113, 71

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..65.

EXAMPLE

a(32) = 32+(a(21)+a(12)+a(1)) = 32+32+16+1 = 81;

a(33) = 33+(a(16)+a(5)+a(2)+a(1)) = 33+33+11+3+1 = 81.

CROSSREFS

Sequence in context: A216487 A328984 A328190 * A113830 A237055 A074368

Adjacent sequences: A090975 A090976 A090977 * A090979 A090980 A090981

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Feb 28 2004

STATUS

approved