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 A249897 a(n+1) is next smallest square not divisible by 10 beginning with a(n), initial term is 7. 5
 7, 729, 729316, 7293164743396, 72931647433968832639882896, 72931647433968832639882896319584064899663299793041401 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Hiroaki Yamanouchi, Table of n, a(n) for n = 1..10 PROG (PARI) a(n)=k=n; s=1; while(s<5*10^7, if(s%10, if(s^2\(10^(#Str(s^2)-#Str(k)))==k, print1(s^2, ", "); k=s^2)); s++) a(7) (Python) def f(x): ..print(x, end=', ') ..n = x ..s = 1 ..while s < 10**7: ....if s % 10: ......S = str(s**2) ......if S.startswith(str(n)): ........print(s**2, end=', ') ........n = s**2 ....s += 1 f(7) CROSSREFS Cf. A048559, A048561. Sequence in context: A083978 A162138 A067448 * A249834 A064571 A111476 Adjacent sequences:  A249894 A249895 A249896 * A249898 A249899 A249900 KEYWORD nonn,base AUTHOR Derek Orr, Nov 08 2014 EXTENSIONS a(5)-a(6) corrected by Hiroaki Yamanouchi, Nov 17 2014 STATUS approved

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Last modified January 25 19:09 EST 2020. Contains 331249 sequences. (Running on oeis4.)