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A038247
Triangle whose (i,j)-th entry is binomial(i,j)*5^(i-j)*5^j.
1
1, 5, 5, 25, 50, 25, 125, 375, 375, 125, 625, 2500, 3750, 2500, 625, 3125, 15625, 31250, 31250, 15625, 3125, 15625, 93750, 234375, 312500, 234375, 93750, 15625, 78125, 546875, 1640625, 2734375, 2734375, 1640625, 546875, 78125
OFFSET
0,2
REFERENCES
B. N. Cyvin et al., Isomer enumeration of unbranched catacondensed polygonal systems with pentagons and heptagons, Match, No. 34 (Oct 1996), pp. 109-121.
MATHEMATICA
Table[Binomial[i, j]5^(i-j) 5^j, {i, 0, 10}, {j, 0, i}]//Flatten (* Harvey P. Dale, May 01 2022 *)
CROSSREFS
Sequence in context: A245130 A263872 A237654 * A263798 A257607 A093643
KEYWORD
nonn,tabl,easy
AUTHOR
STATUS
approved