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 #5 Mar 30 2012 17:40:35
%S 1,925,1426,6112,9801,140301,251945,578151,2112860,78883630,466005001,
%T 52244922262,394240923000,527042773467,706743866647,797657661680,
%U 869119510700,1445531162626,3905876132501,5205252778462,63253297234426,135399021815552
%N Pentagonal numbers (A000326) whose digit reversal is a powerful(1) number (A001694).
%e 925 is the 25th pentagonal number and 529=23^2 is powerful.
%Y Cf. A000326, A001694, A115695.
%K nonn,base
%O 1,2
%A _Giovanni Resta_, Jan 31 2006
%E a(19)-a(22) from _Donovan Johnson_, Jun 29 2011