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A225049 Numbers that can be expressed as n plus sum of squared digits(n) in more than one way. 2
30, 41, 56, 81, 95, 96, 98, 101, 112, 114, 121, 125, 131, 142, 146, 152, 157, 168, 173, 177, 182, 186, 191, 196, 197, 199, 206, 209, 213, 215, 216, 217, 227, 230, 232, 234, 240, 243, 245, 247, 248, 257, 260, 262, 266, 272, 276, 284, 285, 287, 292, 299, 300 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Christian N. K. Anderson, Table of n, a(n) for n = 1..10000

Christian N. K. Anderson, All the integers that yield a(n) for n=1..10000

EXAMPLE

a(13) = 131 is included because 131 = 57+5^2+7^2 = 73+7^2+3^2 = 105+1^2+5^2 = 122 + 1^2+4^2+4^2.

PROG

(R) digsqsum<-function(x) sum(as.numeric(unlist(strsplit(as.character(x), split="")))^2)

1:500+sapply(1:500, digsqsum)->y

table(y)->ty; names(ty[ty>1])

CROSSREFS

Cf. A225048, A003052, A003219, A003132, A062028, A066568.

Sequence in context: A181638 A166650 A275193 * A043120 A039297 A043900

Adjacent sequences:  A225046 A225047 A225048 * A225050 A225051 A225052

KEYWORD

nonn,base

AUTHOR

Kevin L. Schwartz and Christian N. K. Anderson, Apr 25 2013

STATUS

approved

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Last modified August 21 06:54 EDT 2019. Contains 326162 sequences. (Running on oeis4.)