1,1

Note that consecutive terms are not necessarily generated by consecutive values of n.

It appears that 146 is the only term that can be generated by two values of n (7 and 9). There are no other duplicates in the first 10000 terms.

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

For n=11: 11^2=121; 121 + 1^2 + 2^2 + 1^2 = 127.

(R) sort(unique((1:101)^2+sapply((1:101)^2, function(x) sum(as.numeric(unlist(strsplit(as.character(x), split="")))^2))))

Cf. A176995, A062028, A209303.

Sequence in context: A202602 A097652 A261838 * A059211 A139271 A133217

Adjacent sequences: A225062 A225063 A225064 * A225066 A225067 A225068

nonn,base

Kevin L. Schwartz and Christian N. K. Anderson, Apr 26 2013

approved