Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #8 Oct 31 2013 04:14:58
%S 0,1,9,20,89,177,273,374,485,666,1275,1894,2583,3391,4209,5097,6003,
%T 6919,7905,8906,10017,11708,13589,15550,21559,27678,34377,41266,48235,
%U 56243,64361,73059,81947,90915,99921,109037
%N Sum of the first n strobogrammatic numbers.
%D G. L. Honaker, Jr., Pentagrammic Decryption, unpublished.
%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Strobogrammatic_number">Strobogrammatic number</a>
%e a(10) = 666 because 0+1+8+11+69+88+96+101+111+181 = 666.
%Y Cf. partial sums of A000787.
%K nonn,base,easy
%O 1,3
%A _G. L. Honaker, Jr._, Oct 31 2013