A116320
n times n+8 gives the concatenation of two numbers m and m+4.
Original entry on oeis.org
4, 86, 32762, 67231, 76322, 693956, 900097, 7295105, 9068525, 3664355432, 6335644561, 8015841979, 8419801579, 9900000997, 3252382148828, 6747617851165, 7253863787097, 9474890578438, 9981136514370
Offset: 1
-
Res:= NULL: count:= 0:
for d from 1 while count < 100 do
R:= sort(select(t -> t^2 + 8*t - 4 > 10^(2*d-1) and t^2+8*t-4 < 10^(2*d), map(t -> rhs(op(t)), [msolve(n^2+8*n-4, 10^d+1)])));
count := count+nops(R);
Res:= Res, op(R);
od:
Res; # Robert Israel, Jun 20 2018
A116190
Numbers k such that k concatenated with k+4 gives the product of two numbers which differ by 9.
Original entry on oeis.org
16, 36, 12366, 42036, 64996, 1589736168, 1921234732, 3154856388, 3615437032, 5939192968, 6565302732, 1888656611704713276, 2251541774559900786, 2761459004510103616, 3196921199936328628, 63080834574071218603723158
Offset: 1
A116313
n times n+9 gives the concatenation of two numbers m and m+3.
Original entry on oeis.org
3, 38569, 61423, 88696, 3686022, 6313970, 7223061, 84319381, 98033553, 345087246071675410527410, 403910775483440116409763, 596089224516559883590229, 654912753928324589472582
Offset: 1
98033553 * 98033562 = 96105783//96105786, where // denotes
concatenation.
A116328
n times n+9 gives the concatenation of two numbers m and m+5.
Original entry on oeis.org
46, 4947936213, 5052063779, 9742829100, 32730757363062987012674789, 67269242636937012987325203, 99706862598549297056423092, 3163201195414530993427385140698350
Offset: 1
Showing 1-4 of 4 results.
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