A285985 - cp's OEIS frontend

A285985 Numbers a(n) = (T(b(n)))^2, where T(b(n)) is the triangular number of b(n)= A000217(b(n)) and b(n)=A006451(n). Also a(n) = parameters K of the Bachet Mordell equation y^2=x^3+K, where x= T(b(n)) = A006454(n) and y= T(b(n))* sqrt(T(b(n))+1) = A285955(n).

n	a(n)
0	0
1	9
2	225
3	14400
4	278784
5	16769025
6	322382025
7	19356600384
8	372051201600
9	22337675375625
10	429347532814209
11	25777663981977600
12	495466706924481600
13	29747402099825117409
14	571768151330225342025
15	34328476252406392070400
16	659819951198501829398784
17	39615031848108328736769225
18	761431651915943270106720225
19	45715712424248689455481003584
20	878691466491082103705616000000

[0, 9, 225, 14400, 278784, 16769025, 322382025, 19356600384, 372051201600, 22337675375625, 429347532814209, 25777663981977600, 495466706924481600, 29747402099825117409, 571768151330225342025, 34328476252406392070400, 659819951198501829398784, 39615031848108328736769225, 761431651915943270106720225, 45715712424248689455481003584, 878691466491082103705616000000]

cp's OEIS Frontend

A285985 Numbers a(n) = (T(b(n)))^2, where T(b(n)) is the triangular number of b(n)= A000217(b(n)) and b(n)=A006451(n). Also a(n) = parameters K of the Bachet Mordell equation y^2=x^3+K, where x= T(b(n)) = A006454(n) and y= T(b(n))* sqrt(T(b(n))+1) = A285955(n).

Table of values

List of values