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A015220 as a simple table

na(n)
00
14
210
320
456
584
6120
7220
8286
9364
10560
11680
12816
131140
141330
151540
162024
172300
182600
193276
203654
214060
224960
235456
245984
257140
267770
278436
289880
2910660
3011480
3113244
3214190
3315180
3417296
3518424
3619600
3722100
3823426
3924804
4027720
4129260
4230856
4334220
4435990

[0,4,10,20,56,84,120,220,286,364,560,680,816,1140,
 1330,1540,2024,2300,2600,3276,3654,4060,4960,5456,
 5984,7140,7770,8436,9880,10660,11480,13244,14190,
 15180,17296,18424,19600,22100,23426,24804,27720,
 29260,30856,34220,35990]