id:A092406 - OEIS Search Results

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a(n)=sigma(n) if sigma(n)>=a(n-1), else a(n)=a(n-1)+sigma(n).

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1, 3, 4, 7, 13, 25, 33, 48, 61, 79, 91, 119, 133, 157, 181, 212, 230, 269, 289, 331, 363, 399, 423, 483, 514, 556, 596, 652, 682, 754, 786, 849, 897, 951, 999, 1090, 1128, 1188, 1244, 1334, 1376, 1472, 1516, 1600, 1678, 1750, 1798, 1922, 1979, 2072, 2144, 2242 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Does a(n)=sigma(n) only for n=1,2,3,4?`
	PROGRAM	`(PARI) { v=vector(60); v[1]=sigma(1); for (i=2, 60, if (sigma(i)<v[i-1], v[i]=v[i-1]+sigma(i), v[i]=sigma(i))); v }`
	CROSSREFS	`Cf. A000203.` `Sequence in context: A029552 A125118 A116201 this_sequence A121174 A050071 A041002` `Adjacent sequences: A092403 A092404 A092405 this_sequence A092407 A092408 A092409`
	KEYWORD	`nonn`
	AUTHOR	`Jon Perry (perry(AT)globalnet.co.uk), Mar 22 2004`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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